GI.Gtk.Objects.PadController

PadController is an event controller for the pads found in drawing tablets (The collection of buttons and tactile sensors often found around the stylus-sensitive area).

These buttons and sensors have no implicit meaning, and by default they perform no action, this event controller is provided to map those to Action objects, thus letting the application give those a more semantic meaning.

Buttons and sensors are not constrained to triggering a single action, some InputSourceTabletPad devices feature multiple "modes", all these input elements have one current mode, which may determine the final action being triggered. Pad devices often divide buttons and sensors into groups, all elements in a group share the same current mode, but different groups may have different modes. See devicePadGetNGroups and devicePadGetGroupNModes.

Each of the actions that a given button/strip/ring performs for a given mode is defined by PadActionEntry, it contains an action name that will be looked up in the given ActionGroup and activated whenever the specified input element and mode are triggered.

A simple example of PadController usage, assigning button 1 in all modes and pad devices to an "invert-selection" action: > > GtkPadActionEntry *pad_actions[] = { > { GTK_PAD_ACTION_BUTTON, 1, -1, "Invert selection", "pad-actions.invert-selection" }, > … > }; > > … > action_group = g_simple_action_group_new (); > action = g_simple_action_new ("pad-actions.invert-selection", NULL); > g_signal_connect (action, "activate", on_invert_selection_activated, NULL); > g_action_map_add_action (G_ACTION_MAP (action_group), action); > … > pad_controller = gtk_pad_controller_new (window, action_group, NULL);

The actions belonging to rings/strips will be activated with a parameter of type G_VARIANT_TYPE_DOUBLE bearing the value of the given axis, it is required that those are made stateful and accepting this VariantType.

Exported types

newtype PadController

Memory-managed wrapper type.

Constructors

PadController (ManagedPtr PadController)

Instances

Eq PadController

Defined in GI.Gtk.Objects.PadController

Methods

(==) :: PadController -> PadController -> Bool

(/=) :: PadController -> PadController -> Bool

IsGValue PadController

Convert PadController to and from GValue with toGValue and fromGValue.

Defined in GI.Gtk.Objects.PadController

Methods

toGValue :: PadController -> IO GValue

fromGValue :: GValue -> IO PadController

GObject PadController

Defined in GI.Gtk.Objects.PadController

Methods

gobjectType :: IO GType

HasParentTypes PadController

Defined in GI.Gtk.Objects.PadController

type ParentTypes PadController

Defined in GI.Gtk.Objects.PadController

type ParentTypes PadController = '[EventController, Object]

class (GObject o, IsDescendantOf PadController o) => IsPadController o

Type class for types which can be safely cast to PadController, for instance with toPadController.

Instances

(GObject o, IsDescendantOf PadController o) => IsPadController o

Defined in GI.Gtk.Objects.PadController

toPadController :: (MonadIO m, IsPadController o) => o -> m PadController

Cast to PadController, for types for which this is known to be safe. For general casts, use castTo.

noPadController :: Maybe PadController

A convenience alias for Nothing :: Maybe PadController.

Methods

Overloaded methods

new

padControllerNew

Arguments

:: (HasCallStack, MonadIO m, IsWindow a, IsActionGroup b, IsDevice c)

=> a

window: a Window

-> b

group: ActionGroup to trigger actions from

-> Maybe c

pad: A InputSourceTabletPad device, or Nothing to handle all pads

-> m PadController

Returns: A newly created PadController

Creates a new PadController that will associate events from pad to actions. A Nothing pad may be provided so the controller manages all pad devices generically, it is discouraged to mix PadController objects with Nothing and non-Nothing pad argument on the same window, as execution order is not guaranteed.

The PadController is created with no mapped actions. In order to map pad events to actions, use padControllerSetActionEntries or padControllerSetAction.

Since: 3.22

setAction

padControllerSetAction

Arguments

:: (HasCallStack, MonadIO m, IsPadController a)

=> a

controller: a PadController

-> PadActionType

type: the type of pad feature that will trigger this action

-> Int32

index: the 0-indexed button/ring/strip number that will trigger this action

-> Int32

mode: the mode that will trigger this action, or -1 for all modes.

-> Text

label: Human readable description of this action, this string should be deemed user-visible.

-> Text

actionName: action name that will be activated in the ActionGroup

-> m ()

Adds an individual action to controller. This action will only be activated if the given button/ring/strip number in index is interacted while the current mode is mode. -1 may be used for simple cases, so the action is triggered on all modes.

The given label should be considered user-visible, so internationalization rules apply. Some windowing systems may be able to use those for user feedback.

Since: 3.22

setActionEntries

padControllerSetActionEntries

Arguments

:: (HasCallStack, MonadIO m, IsPadController a)

=> a

controller: a PadController

-> [PadActionEntry]

entries: the action entries to set on controller

-> m ()

This is a convenience function to add a group of action entries on controller. See PadActionEntry and padControllerSetAction.

Since: 3.22

Properties

actionGroup

No description available in the introspection data.

constructPadControllerActionGroup :: (IsPadController o, IsActionGroup a) => a -> IO (GValueConstruct o)

Construct a GValueConstruct with valid value for the “action-group” property. This is rarely needed directly, but it is used by new.

getPadControllerActionGroup :: (MonadIO m, IsPadController o) => o -> m (Maybe ActionGroup)

Get the value of the “action-group” property. When overloading is enabled, this is equivalent to

get padController #actionGroup

pad

No description available in the introspection data.

constructPadControllerPad :: (IsPadController o, IsDevice a) => a -> IO (GValueConstruct o)

Construct a GValueConstruct with valid value for the “pad” property. This is rarely needed directly, but it is used by new.

getPadControllerPad :: (MonadIO m, IsPadController o) => o -> m (Maybe Device)

Get the value of the “pad” property. When overloading is enabled, this is equivalent to

get padController #pad